本文实例为大家分享了JavaScript实现网页版计算器的具体代码,供大家参考,具体内容如下
由于无聊看电脑上的系统软件翻到了计算器这个功能,就简单写一下这个计算器的功能吧,这个网页版计算器基本功能都有吧,但是不是很完全,仅供参考。
首先是网页计算器的样式部分不想手写直接复制即可
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
.cal {
width: 420px;
margin: 100px auto;
background-color: #E6E6E6;
padding: 2px;
overflow: hidden;
}
.show {
position: relative;
width: 416px;
height: 120px;
font-size: 50px;
line-height: 50px;
font-weight: 700;
}
.show button {
display: none;
position: absolute;
top: -2px;
right: -2px;
width: 60px;
height: 40px;
line-height: 40px;
text-align: center;
border: transparent;
background-color: #E6E6E6;
font-size: 30px;
font-weight: 100;
cursor: pointer;
}
.show button:hover {
background-color: #e81123;
color: #f0f0f0
}
.res,
.left,
.right {
position: absolute;
bottom: 0;
height: 60px;
line-height: 60px;
padding: 0 3px;
}
.res {
right: 0;
/* width: 100%; */
text-align: right;
}
.left {
display: none;
background-color: #E6E6E6;
}
.right {
display: none;
right: 0;
background-color: #E6E6E6;
}
.left:hover,
.right:hover {
color: #2e8eda;
}
.keyboard {
display: flex;
flex-wrap: wrap;
justify-content: center;
}
.btn {
display: flex;
justify-content: center;
width: 100px;
height: 60px;
line-height: 60px;
margin: 2px;
background-color: #f0f0f0;
border: transparent;
font-size: large;
}
.btn:hover {
background-color: #d6d6d6;
}
.digital {
background-color: #fafafa;
font-weight: 700;
}
.equal {
background-color: #8abae0;
}
.equal:hover {
background-color: #4599db;
}
</style>
</head>
<body>
<div class="cal">
<div class="show">
<button class="close">×</button>
<div class="res">0</div>
<div class="left"><</div>
<div class="right">></div>
</div>
<div class="keyboard">
<!-- 0 -->
<button class="btn percent">%</button>
<!-- 1 -->
<button class="btn clearOne">CE</button>
<!-- 2 -->
<button class="btn clearAll">C</button>
<!-- 3 -->
<button class="btn back">del</button>
<!-- 4 -->
<button class="btn div1">1/x</button>
<!-- 5 -->
<button class="btn square">x²</button>
<!-- 6 -->
<button class="btn sqrt">²√x</button>
<!-- 7 -->
<button class="btn div">÷</button>
<!-- 8 -->
<button class="btn digital">7</button>
<!-- 9 -->
<button class="btn digital">8</button>
<!-- 10 -->
<button class="btn digital">9</button>
<!-- 11 -->
<button class="btn mul">x</button>
<!-- 12 -->
<button class="btn digital">4</button>
<!-- 13 -->
<button class="btn digital">5</button>
<!-- 14 -->
<button class="btn digital">6</button>
<!-- 15 -->
<button class="btn sub">-</button>
<!-- 16 -->
<button class="btn digital">1</button>
<!-- 17 -->
<button class="btn digital">2</button>
<!-- 18 -->
<button class="btn digital">3</button>
<!-- 19 -->
<button class="btn add">+</button>
<!-- 20 -->
<button class="btn neg">+/-</button>
<!-- 21 -->
<button class="btn digital">0</button>
<!-- 22 -->
<button class="btn digital">.</button>
<!-- 23 -->
<button class="btn equal">=</button>
</div>
</div>
<script src="./计算机.js"></script>
</body>
</html>
js部分:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
const bt = document.querySelectorAll('.keyboard button')
const close = document.querySelector('.close')
const res = document.querySelector('.res')
//当点击的数字的时候
let k = 0
let one
let two
function arr(num) {
bt[num].onclick = function () {
res.innerText += bt[num].innerText
res.innerText = parseFloat(res.innerText)
// console.log(one)
}
}
//小数点
//保留结果小数
function fn() {
if (res.innerText.length > 8) {
res.innerText = res.innerText.slice(0, 10)
}
if (res.innerText == 'NaN') {
res.innerText = 0
}
}
//当点击的是运算符号的时候
function symbol(str, fu) {
bt[str].onclick = function () {
k++
if (k > 1) {
return
}
one = parseFloat(res.innerText)
// switch (fu) {
// case '+':
// one += one
// break;
// case '-':
// one -= one
// break;
// case '*':
// one *= one
// break;
// case '/':
// one /= one
// break;
// }
res.innerText = ''
close.style.display = 'block'
close.innerText = bt[str].innerText
console.log(one)
}
}
arr(21)
arr(18)
arr(17)
arr(16)
arr(14)
arr(13)
arr(12)
arr(10)
arr(9)
arr(8)
arr(22)
//运算符号
symbol(0)
symbol(7, '/')
symbol(11, '*')
symbol(15, '-')
symbol(19, '+')
console.log(bt[22].innerText)
bt[22].onclick = function () {
res.innerText += bt[22].innerText
console.log(565)
}
bt[23].onclick = function () {
two = parseFloat(res.innerText)
switch (close.innerText) {
case '%':
//toFixed(11)保留11位小数
res.innerText = one % two
k = 0
break;
case '+':
res.innerText = one + two
k = 0
break;
case '-':
res.innerText = one - two
k = 0
break;
case 'x':
res.innerText = one * two
k = 0
break;
case '÷':
res.innerText = one / two
k = 0
break;
}
// console.log(res.innerText.length)
fn()
}
bt[1].onclick = function () {
res.innerText = ''
}
bt[2].onclick = function () {
res.innerText = '0'
close.innerText = 'x'
close.style.display = ''
one = 0
two = 0
}
bt[3].onclick = function () {
res.innerText = res.innerText.slice(0, res.innerText.length - 1)
if (res.innerText.length === 0) {
res.innerText = '0'
return
}
}
bt[4].onclick = function () {
res.innerText = 1 / parseFloat(res.innerText)
fn()
}
bt[5].onclick = function () {
res.innerText = parseFloat(res.innerText) * parseFloat(res.innerText)
fn()
}
bt[6].onclick = function () {
res.innerText = Math.sqrt(parseFloat(res.innerText))
fn()
}
bt[20].onclick = function () {
res.innerText = 0 - parseFloat(res.innerText)
fn()
}